CN104453236A - Circulating water natural cooling system and method for controlling mass concrete cracks - Google Patents
Circulating water natural cooling system and method for controlling mass concrete cracks Download PDFInfo
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- CN104453236A CN104453236A CN201410800477.8A CN201410800477A CN104453236A CN 104453236 A CN104453236 A CN 104453236A CN 201410800477 A CN201410800477 A CN 201410800477A CN 104453236 A CN104453236 A CN 104453236A
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Abstract
The invention discloses a circulating water natural cooling system and method for controlling mass concrete cracks and belongs to the technical field of constructional engineering. The circulating water natural cooling system for controlling mass concrete cracks is suitable for control over the temperature cracks in the surface of mass concrete. By reasonably arranging sub-regions of a natural cooling tank, an internal water source can be repeatedly used; afterwards, circulating water is stored on the surface of the mass concrete, so that the redundant heat on the surface of the concrete is brought outwards through heat exchange by circulating water in time; in this way, the temperature difference of the concrete between inside and outside is reduced, the probability that the temperature cracks in the surface of mass concrete occur is greatly lowered, the engineering cost can be lowered by 50%, the construction period can be shortened by 30%, and low carbon and environmental friendliness are really achieved.
Description
Technical field
The present invention relates to a kind of the circulating water natural cooling system and the practice that control Volume Concrete Cracks, belong to construction engineering technical field.
Background technology
The fast development of modern science and technology, promote the huge advance of China's engineering construction, modern project structure is just more and more higher towards volume, increasing, the comprehensive future development that build more sophisticated, function are various especially, and large volume concrete structural just arises at the historic moment thereupon.But concrete can produce a large amount of heats of hydration in the process of pouring & maintenance, the thermogenetic thermal stresses of aquation can cause the generation of structural cracks.This crack is strong to structural damage power, has a strong impact on the use of structure, how farthest to reduce or avoids producing this engineering problem of thermal cracking and just put in face of people.
Traditional concrete in mass cool-down method is layered arrangement cooling water pipe before concreting, passes into cooling water afterwards in cooling water pipe, finally cooling water pipe is carried out grouting and closes.This way cooling-down effect is good, but there is larger problem, mainly only serving cooling effect to the concrete in 1m with this way, and obvious effect is not had substantially to the concrete beyond water pipe 1m, simultaneously owing to needing to arrange a large amount of cooling water pipes in advance, therefore operate comparatively complicated, cost also costly.Based on this, the present invention proposes a kind of principle simple, cheap, be easy to the circulating water cooling system of the band nature cooling bath of constructing.By adding division board in cooling bath, inner water source can be recycled, by circulating water pipe by natural cooling bath with cooling tank is organic links together, effectively the construction period can be shortened compared to conventional practice, reduce construction cost, really accomplish green low-carbon environment-friendly, be highly suitable for the construction of volume of concrete foundation.
Summary of the invention
The object of the present invention is to provide a kind of a kind of circulating water natural cooling system controlling Volume Concrete Cracks with advantages such as simple structure, cheap, easy construction, green low-carbon environment-friendly integrations, to effectively solving complicated operation in traditional concrete in mass cooling water temperature method, involve great expense, cannot the shortcoming such as environmental protection.
For achieving the above object, the present invention adopts following technical scheme:
Control a circulating water natural cooling system for Volume Concrete Cracks, this system comprises nature cooling bath 1, division board 2, circulating water pipe 3, cooling tank 4, concrete in mass 5;
Division board 2 is arranged on the inside of nature cooling bath 1, and concrete in mass 5 is arranged on the inside of cooling tank 4, and natural cooling bath 1 is linked into an integrated entity by circulating water pipe 3 with concrete in mass 5.
By adding division board 2 in natural cooling bath 1 inside, inner water source can be recycled, by circulating water pipe 3, natural cooling bath 1, concrete in mass 5 being linked together afterwards, form the circulating water cooling system of band nature cooling bath.
Described natural cooling bath 1 is the temperature regulation structure of system, be positioned at the both sides of concrete in mass 5, for spill sink structure, common brick can be adopted to build by laying bricks or stones, the length of nature cooling bath 1 is with the length of concrete in mass 5,1:2.5 cement sand plaster can be adopted, reserve the slot of division board 2 simultaneously at the middle part of natural cooling bath 1; Division board 2 is divided into upper district and inferior segment natural cooling bath, and upper district establishes a water pump.
Described division board 2 is the spacer assembly of nature cooling bath 1.The high-strength steel mesh reinforced cement-mortar board that block-water effect is good can be adopted.
Described circulating water pipe 3 is the pipe-line of system.Adopt DG150 header, material can make cast iron or plastics.Starting point is nature cooling bath 1 one end water pump, is connected to cooling tank 4 afterwards, then is connected to terminal nature cooling bath 1 one end water pump in addition from cooling tank 4.
Described cooling tank 4 is the cooling water storage structure of reclaimed water system, and it is in the pond of concrete in mass surrounding brick work, common brick can be adopted to build by laying bricks or stones and use 1:2 cement sand plaster; Cooling tank 4 each side arranges a water inlet and a delivery port, is conveniently connected with circulating water pipe 3.
Described concrete in mass 5 is the control object of reclaimed water system, for concrete structural solid minimum geometries is not less than the large scale of construction concrete of 1m, or the variations in temperature that can cause because of cementitious material aquation in concrete and contraction and the concrete causing harmful cracks to produce.
Described a kind of circulating water natural cooling system controlling Volume Concrete Cracks, its preparation method is as follows:
The first step, brick two natural cooling baths 1 outside distance concrete in mass 5 both sides, inner configuration each 1 of water pump, inserts division board 2, higher than natural cooling bath 1 at least 200mm at reserved slot position place;
Second step, concrete in mass 5 is in time covered with plastic film maintenance of sprinkling water after building, concrete side adopts double gunny bag sheet to cover moisturizing simultaneously, along with 1:2 cement sand plaster is also used along the brick cooling tank 4 of plate face surrounding external application in the receipts face of concrete in mass 5;
3rd step, connects both sides nature cooling bath 1 and cooling tank 4 by circulating water pipe 3, starting point is water pump bottom district on nature cooling bath 1, arrives cooling tank 4 side water inlet afterwards, is then connected to nature cooling bath 1 inferior segment from cooling tank 4 side delivery port;
4th step, after first time circulation retaining, the inferior segment that first water source in cooling tank 4 is discharged to nature cooling bath 1 carries out nature cooling, wait cooling complete after open division board 2 and inferior segment water returned in district proceed circulation.Concrete circulation process is: maintenance first day takes watering measure; Second and third sky requires every four hours water circulations once, water-storage depth 200mm ~ 240mm; Within 4th day, require every six h cycle retainings once, water-storage depth 240mm; After five days, every eight h cycle once, water-storage depth 150mm; Water-storage depth reduces 20mm, until 14 days remove water every day after 7th day.Finally form a kind of circulating water natural cooling system controlling Volume Concrete Cracks.
A kind of circulating water natural cooling system controlling Volume Concrete Cracks of the present invention is applicable to the control of mass concrete surface thermal cracking.By the subregion of reasonable arrangement nature cooling bath, inner water source can constantly reciprocation cycle be used, well save water resource, carry out recirculated water retaining in mass concrete surface afterwards, make the waste heat of concrete surface be recycled the timely interchange of heat of water and go out, reduce temperature difference between inside and outside concrete, greatly reduce the possibility that massive concrete temperature cracks occurs, construction costs can be made to reduce by 50%, and the duration shortens 30%, really accomplishes green low-carbon environment-friendly simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of circulating water natural cooling system schematic diagram controlling Volume Concrete Cracks.
In figure: 1, natural cooling bath, 2, division board, 3, circulating water pipe, 4, cooling tank, 5, concrete in mass.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described:
As shown in Figure 1, a kind of circulating water natural cooling system controlling Volume Concrete Cracks of the present invention, this system comprises nature cooling bath 1, division board 2, circulating water pipe 3, cooling tank 4, concrete in mass 5.
Division board 2 is arranged on the inside of nature cooling bath 1, and concrete in mass 5 is arranged on the inside of cooling tank 4, and natural cooling bath 1 is linked into an integrated entity by circulating water pipe 3 with concrete in mass 5.
By adding division board 2 in natural cooling bath 1 inside, inner water source can be recycled, by circulating water pipe 3, natural cooling bath 1, concrete in mass 5 being linked together afterwards, form the circulating water cooling system of band nature cooling bath.
Described natural cooling bath 1 is the temperature regulation measure of system.Be positioned at the 0.8m place, both sides of concrete in mass 5, for spill sink structure, common brick can be adopted to build by laying bricks or stones, nature cooling bath 1 width is 500mm, the degree of depth is 700mm, length is with the length of concrete in mass 5, adopt 1:2.5 cement sand plaster, reserve the slot of division board 2 at the middle part of natural cooling bath simultaneously, width is 500mm, is highly 700mm, and thickness is 30 ~ 50mm, division board 2 is divided into upper district and inferior segment natural cooling bath, and upper district establishes a 65WQ36-27-5.5 water pump to provide rising kinetic energy.
Described division board 2 is the spacer assembly of nature cooling bath 1.The high-strength steel mesh reinforced cement-mortar board that block-water effect is good can be adopted, the thickness of division board 2 is 30 ~ 50mm, width is 500mm, be highly 900mm, Main Function is that natural cooling bath 1 is divided into two not only independent but also lower regions contacted, water in nature cooling bath 1 constantly can be moved in circles use, and without the need to entering municipal drainage network, greatly can save water source.
Described circulating water pipe 3 is the pipe-line of system.Adopt DG150 header, internal diameter is 150mm, and material can make cast iron or plastics.Starting point is nature cooling bath 1 one end water pump, is connected to cooling tank 4 afterwards, then is connected to terminal nature cooling bath 1 one end water pump in addition from cooling tank 4.
Described cooling tank 4 is the cooling retaining measure of reclaimed water system.Wide at concrete in mass surrounding brick work 120mm, the pond that 240mm is high, common brick can be adopted to build by laying bricks or stones, and (as the thick 1.8m of concrete in mass, it is high to build the thick 240mm of 120mm by laying bricks or stones; When concrete in mass thickness is greater than 2.0m, it is high to build the wide 350mm of 240mm by laying bricks or stones, and uses 1:2 cement sand plaster, (making 30mm radius arc corner protector at inner corner trim place).By the retaining of cooling tank, the temperature heat on concrete in mass 5 surface is dissipated away in time by interchange of heat, require that the water level of each retaining should at least higher than concrete in mass 5 end face 240mm, cooling tank 4 each side arranges a water inlet and a delivery port, is conveniently connected with circulating water pipe 3.
Described concrete in mass 5 is the control object of reclaimed water system.Main finger concrete structural solid minimum geometries is not less than the large scale of construction concrete of 1m, or the variations in temperature that can cause because of cementitious material aquation in concrete and contraction and the concrete causing harmful cracks to produce.
Described a kind of circulating water natural cooling system controlling Volume Concrete Cracks, its preparation method is as follows:
The first step, the natural cooling bath 1 (1:2.5 cement sand plaster) of brick two 500*700mm of 0.8m (wide * is high) outside distance concrete in mass 5 both sides, inner each 1 of configuration 65WQ36-27-5.5 water pump, division board 2 is inserted, higher than natural cooling bath 1 at least 200mm at reserved slot position place;
Second step, concrete in mass 5 is in time covered with plastic film maintenance of sprinkling water after building, concrete side adopts double gunny bag sheet to cover moisturizing simultaneously, along with the receipts face of concrete in mass 5 is wide along the plate face brick 120mm of surrounding external application, the high cooling tank 4 of 240mm is (when concrete in mass 5 thickness is less than 2m, building width by laying bricks or stones is 120mm, is highly 240mm; When concrete in mass 5 thickness is greater than 2.0m, building width by laying bricks or stones is 240mm, is highly 350mm, and uses 1:2 cement sand plaster, is 30mm radius arc shape at inner corner trim place);
3rd step, connects both sides nature cooling bath 1 and cooling tank 4 by circulating water pipe 3, starting point is water pump bottom district on nature cooling bath 1, arrives cooling tank 4 side water inlet afterwards, is then connected to nature cooling bath 1 inferior segment from cooling tank 4 side delivery port;
4th step, after first time circulation retaining, the inferior segment that first water source in cooling tank 4 is discharged to nature cooling bath 1 carries out nature cooling, Deng cooling complete after open division board 2 and inferior segment water returned in upper district proceed circulation, concrete circulation process is: maintenance first day takes watering measure; Second and third sky requires every four hours water circulations once, water-storage depth 200mm ~ 240mm; Within 4th day, require every six h cycle retainings once, water-storage depth 240mm; After five days, every eight h cycle once, water-storage depth 150mm; Water-storage depth reduces 20mm, until 14 days remove water every day after 7th day.Finally form a kind of circulating water natural cooling system controlling Volume Concrete Cracks.
Nature cooling bath 1 is made to be divided into upper and lower 2nd district by adopting division board 2, upper district is the inlet area of circulating water flow to cooling tank 4, inferior segment is the backwater region that cooling tank 4 flows out recirculated water, Shang Qu is got back to by division board 2 again through Temperature fall inferior segment water, make the water source in whole system can accomplish the use that moves in circles, the too much heat on concrete in mass 5 surface is reduced by circulation retaining, reach the effect controlling temperature difference between inside and outside concrete, this system principle is simple, easy to operate, cheap, be applicable to very much the control of massive concrete temperature cracks in construction.Be more than an exemplary embodiments of the present invention, enforcement of the present invention is not limited thereto.
Claims (8)
1. control a circulating water natural cooling system for Volume Concrete Cracks, it is characterized in that: this system comprises nature cooling bath (1), division board (2), circulating water pipe (3), cooling tank (4), concrete in mass (5);
Division board (2) is arranged on the inside of nature cooling bath (1), concrete in mass (5) is arranged on the inside of cooling tank (4), and natural cooling bath (1) and concrete in mass (5) are linked into an integrated entity by circulating water pipe (3).
2. a kind of circulating water natural cooling system controlling Volume Concrete Cracks according to claim 1, it is characterized in that: the temperature regulation structure that described natural cooling bath (1) is system, be positioned at the both sides of concrete in mass (5), for spill sink structure, common brick can be adopted to build by laying bricks or stones; The length of the same concrete in mass of length (5) of nature cooling bath (1), can adopt 1:2.5 cement sand plaster, reserves the slot of division board (2) at the middle part of natural cooling bath (1) simultaneously; Division board (2) is divided into upper district and inferior segment natural cooling bath, and upper district establishes a water pump.
3. a kind of circulating water natural cooling system controlling Volume Concrete Cracks according to claim 1, is characterized in that: the spacer assembly that described division board (2) is nature cooling bath (1); The high-strength steel mesh reinforced cement-mortar board that block-water effect is good can be adopted.
4. a kind of circulating water natural cooling system controlling Volume Concrete Cracks according to claim 1, is characterized in that: the pipe-line that described circulating water pipe (3) is system; Adopt DG150 header, material can make cast iron or plastics; Starting point is nature cooling bath (1) one end water pump, is connected to cooling tank (4) afterwards, then is connected to terminal nature cooling bath (1) one end water pump in addition from cooling tank (4).
5. a kind of circulating water natural cooling system controlling Volume Concrete Cracks according to claim 1, it is characterized in that: the cooling water storage structure that described cooling tank (4) is reclaimed water system, it is in the pond of concrete in mass surrounding brick work, common brick can be adopted to build by laying bricks or stones and use 1:2 cement sand plaster; Cooling tank (4) each side arranges a water inlet and a delivery port.
6. a kind of circulating water natural cooling system controlling Volume Concrete Cracks according to claim 1, it is characterized in that: the control object that described concrete in mass (5) is reclaimed water system, for concrete structural solid minimum geometries is not less than the large scale of construction concrete of 1m, or the variations in temperature that can cause because of cementitious material aquation in concrete and contraction and the concrete causing harmful cracks to produce.
7. control a preparation method for the circulating water natural cooling system of Volume Concrete Cracks, it is characterized in that: the implementation step of the method is as follows,
The first step, brick two natural cooling baths (1) outside distance concrete in mass (5) both sides, inner configuration each 1 of water pump, inserts division board (2), higher than natural cooling bath (1) at least 200mm at reserved slot position place;
Second step, concrete in mass (5) is in time covered with plastic film maintenance of sprinkling water after building, simultaneously concrete side adopts double gunny bag sheet to cover moisturizing, along with 1:2 cement sand plaster is used along the brick cooling tank of plate face surrounding external application (4) in the receipts face of concrete in mass (5);
3rd step, circulating water pipe (3) is connected both sides nature cooling bath (1) and cooling tank (4), starting point is water pump bottom the upper district of nature cooling bath (1), arrive cooling tank (4) side water inlet afterwards, be then connected to nature cooling bath (1) inferior segment from cooling tank (4) side delivery port;
4th step, after first time circulation retaining, the inferior segment that first water source in cooling tank (4) is discharged to nature cooling bath (1) carries out nature cooling, wait cooling complete after open division board (2) and inferior segment water returned in district proceed circulation.
8. a kind of preparation method controlling the circulating water natural cooling system of Volume Concrete Cracks according to claim 7, is characterized in that: concrete circulation process is that maintenance first day takes watering measure; Second and third sky requires every four hours water circulations once, water-storage depth 200mm ~ 240mm; Within 4th day, require every six h cycle retainings once, water-storage depth 240mm; After five days, every eight h cycle once, water-storage depth 150mm; Water-storage depth reduces 20mm, until 14 days remove water every day after 7th day; Finally form a kind of circulating water natural cooling system controlling Volume Concrete Cracks.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236668A (en) * | 2020-01-14 | 2020-06-05 | 中国建筑第五工程局有限公司 | Construction method for controlling temperature cracks of mass concrete |
| CN112696037A (en) * | 2020-12-23 | 2021-04-23 | 重庆建工第三建设有限责任公司 | Large-volume concrete comprehensive maintenance system |
| CN114370052A (en) * | 2021-12-29 | 2022-04-19 | 厦门中宸集团有限公司 | System for efficiently controlling large-volume concrete cracks and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000328786A (en) * | 1999-05-21 | 2000-11-28 | Shimizu Corp | Crack preventive method and device of concrete |
| CN101672106A (en) * | 2009-08-11 | 2010-03-17 | 中国建筑第五工程局有限公司东莞分公司 | Construction method of temperature decrease and crack prevention of mass concrete by utilizing thin-walled corrugated pipe circulating water system |
| CN103225405A (en) * | 2013-04-08 | 2013-07-31 | 中国葛洲坝集团股份有限公司 | Mass-concrete cooling water recycling device and method |
| KR20140039698A (en) * | 2012-09-25 | 2014-04-02 | 한국건설기술연구원 | Concrete curing sheet for preventing plastic shrinkage crack, and curing method using the same |
| CN204402049U (en) * | 2014-12-21 | 2015-06-17 | 中国中铁航空港建设集团有限公司 | A kind of circulating water natural cooling system controlling Volume Concrete Cracks |
-
2014
- 2014-12-21 CN CN201410800477.8A patent/CN104453236B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000328786A (en) * | 1999-05-21 | 2000-11-28 | Shimizu Corp | Crack preventive method and device of concrete |
| CN101672106A (en) * | 2009-08-11 | 2010-03-17 | 中国建筑第五工程局有限公司东莞分公司 | Construction method of temperature decrease and crack prevention of mass concrete by utilizing thin-walled corrugated pipe circulating water system |
| KR20140039698A (en) * | 2012-09-25 | 2014-04-02 | 한국건설기술연구원 | Concrete curing sheet for preventing plastic shrinkage crack, and curing method using the same |
| CN103225405A (en) * | 2013-04-08 | 2013-07-31 | 中国葛洲坝集团股份有限公司 | Mass-concrete cooling water recycling device and method |
| CN204402049U (en) * | 2014-12-21 | 2015-06-17 | 中国中铁航空港建设集团有限公司 | A kind of circulating water natural cooling system controlling Volume Concrete Cracks |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236668A (en) * | 2020-01-14 | 2020-06-05 | 中国建筑第五工程局有限公司 | Construction method for controlling temperature cracks of mass concrete |
| CN112696037A (en) * | 2020-12-23 | 2021-04-23 | 重庆建工第三建设有限责任公司 | Large-volume concrete comprehensive maintenance system |
| CN114370052A (en) * | 2021-12-29 | 2022-04-19 | 厦门中宸集团有限公司 | System for efficiently controlling large-volume concrete cracks and control method thereof |
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